title: Eventual entrainment of the human circadian pacemaker by melatonin is independent of the circadian phase of treatment initiation: clinical implications.
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001683:Biological Clocks / Q000502:physiology*; D001766:Blindness / Q000150:complications; D021081:Chronobiology Disorders / Q000188:drug therapy* / Q000209:etiology; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008550:Melatonin / Q000008:administration & dosage* / Q000378:metabolism / Q000627:therapeutic use*; D008875:Middle Aged; D017440:Photoperiod; D010789:Phototherapy; D013997:Time Factors; D019987:Persons with Visual Disabilities
chemical_list: D008550:Melatonin